Get theme

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds the useful context that the theme lives in the public StreamElements gallery, consistent with open-world access, but says nothing about failure behavior for an unknown id.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

One sentence, no filler, resource and lookup key front-loaded. It is efficient, though it is so terse that it leaves obvious questions (what is returned) unanswered.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a one-parameter read-only getter with full schema coverage, the definition is minimally sufficient. With no output schema, though, the description could have said what a theme object contains or what happens when the id isn't found.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% for the single themeId parameter, including a regex pattern the description doesn't repeat. Baseline 3 applies — the phrase 'by id' only restates what the schema already documents in more detail.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

Specific verb+resource with scope: get a single theme from the StreamElements gallery by id. The word 'one' distinguishes it from themes_list, though it never names the sibling explicitly. An agent can infer the difference but it isn't stated.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No when-to-use guidance and no mention of themes_list as the alternative for enumerating themes. The single-item framing ('one theme') is the only implicit signal that this is the detail lookup rather than the list call.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.